o4 Mini
OpenAI o4-mini is a compact reasoning model in the o-series, optimized for fast, cost-efficient performance while retaining strong multimodal and agentic capabilities. It supports tool use and demonstrates competitive reasoning and coding performance across benchmarks like AIME (99.5% with Python) and SWE-bench, outperforming its predecessor o3-mini and even approaching o3 in some domains. Despite its smaller size, o4-mini exhibits high accuracy in STEM tasks, visual problem solving (e.g., MathVista, MMMU), and code editing. It is especially well-suited for high-throughput scenarios where latency or cost is critical. Thanks to its efficient architecture and refined reinforcement learning training, o4-mini can chain tools, generate structured outputs, and solve multi-step tasks with minimal delay—often in under a minute.
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100,000Frequently asked questions
- Is o4 Mini available on FastMetal?
- Not at the moment. GPT-5.6 Sol, from the same lab, is available on the FastMetal API today.
- What is the context window of o4 Mini?
- 200,000 tokens, shared between the prompt and the response.
- How does o4 Mini rank?
- #118 on the public arena's Japanese board (ELO 1,347). Ranks move as the leaderboard is updated.